I didn't think it was that bad but everyone in my college seems to have hated it! I tried to work out the sum from n=1 to k but couldn't but then looked at what the terms would be:

57, 54, 51........6, 3, 0, -3, -6........... -51, -54, -57

The negative terms cancel out the positive terms so Sn = 0 when the last term is -57

Total number of terms = 57/3 *2 +1 (+1 for the term which is 0)
= 39 (not sure, just worked it out in my head now!)

I thikn this is right.

For the rest of the paper, some of the logs parts confused me (I hate logs) and I got the differentiation question wrong (I got 22 1/4 and my graphical paper says that it is around 4) and the very last question about the 4tanxsin4x or whatever it was stumped me for ages and in the end I resorted to plotting the graph on a graphical calculator and finding the intercepts that way but I ran out of time after finding the first. But the rest was OK - should get a B at least

(Original post by shyopstv)
I didn't think it was that bad but everyone in my college seems to have hated it! I tried to work out the sum from n=1 to k but couldn't but then looked at what the terms would be:

Yeah, the people in my class who I spoke said it was hard.

57, 54, 51........6, 3, 0, -3, -6........... -51, -54, -57

The negative terms cancel out the positive terms so Sn = 0 when the last term is -57

Total number of terms = 57/3 *2 +1 (+1 for the term which is 0)
= 39 (not sure, just worked it out in my head now!)

I thikn this is right.

But wasn't the first term 87

I did this:
a = 90 (thinking first term was 90)
d = -3 (common difference)

For the rest of the paper, some of the logs parts confused me (I hate logs)

Yeah, logs are difficult sometimes, especially if you misread the question and solve the wrong question, I realised though and did them correctly (I hope).

and I got the differentiation question wrong (I got 22 1/4 and my graphical paper says that it is around 4) and the very last question about the 4tanxsin4x or whatever it was stumped me for ages and in the end I resorted to plotting the graph on a graphical calculator and finding the intercepts that way but I ran out of time after finding the first. But the rest was OK - should get a B at least

The differentiation, who knows whether or not I got that right.

Yeah the last question was pretty difficult at first sight, btw it was 4tan4xsin4x

I said:
0 <= x <= 90
0 <= 4x <= 360
Let 4x = Theta
0 <= Theta <= 360

Then I solved it for theta (well it had already been solved in a previous question)

Did it say normal? Damn I worked out the tangent should still get marks for finding the gradient at intercept I guess. Oh and I meant intergration when I said differentiation - I keep geting the two mixed up.

C1 was absolutely pee pee easy but C2 was awful.
Q8 was only question im sure i got full marks on!!
i had to go over the paper so many times, eventually got it done but it was nasty and everyone at my college found it really hard. still, picked up some easy marks and should have done well enough to get an A with C1 and D1 being so easy.

The negative terms cancel out the positive terms so Sn = 0 when the last term is -57

That was exactly my thought process, assuming you meant 87, 84, 81......-81, -84, -87. All the maths seemed to work at the time, but I'll see. I really hate progressions - they never make any sense to me.

Oooo i dunno, could have asked for the equation, pretty sure it only said the gradient tho, anyone remember? It asked for the equation of the tangent at some point, but i thought it only asked for the gradient on the normal question...?

Yeh i am. Hopefully, it shouldn't be as bad as C2 so i'll be able to push my UMS up a bit considering i'll probably get a D or an E in c2! Good luck to everyone else taking s1, im sure u'll all be fine!